A near-ambient-pressure XPS study on catalytic CO oxidation reaction over a Ru(10 1 ̄ 0) surface

Ryo Toyoshima, Masahiro Shimura, Masaaki Yoshida, Yuji Monya, Kazuma Suzuki, Kenta Amemiya, Kazuhiko Mase, Bongjin Simon Mun, Hiroshi Kondoh

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We investigated the interactions of CO and O2 with Ru(101̄0) single crystal surfaces, and studied the in-situ catalytic oxidation reaction of CO on the surface under near realistic pressure conditions by using a combination of near-ambient-pressure x-ray photoelectron spectroscopy and differential pumping mass spectroscopy. At lower temperatures (T < 190 C), most of the surface keeps metallic and is covered by both chemisorbed atomic oxygen and CO, and the CO2 formation rate is relatively slow. At higher temperatures, the reaction rate significantly increases and reaches the saturation, where the Ru surface is dominated by a bulk oxide (i.e. RuO2).

本文言語English
ページ(範囲)128-132
ページ数5
ジャーナルSurface Science
621
DOI
出版ステータスPublished - 2014 3

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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